提供I2C总线初始化、工作时的启始位、结束位、提供I2C总线的时钟信号，并返回在时钟电平为高期间 SDA信号线上状态。本函数可用于数据发送，也可用于数据接收-provide I2C bus initialization, the Start-end, provide the I2C bus clock signal, the clock and return to the high-level signal line during the SDA state. This function can

MTK中的，模拟时钟绘制，阅读代码时发现这么一个函数，它根据输入的年月日，可以自动计算出星期几-MTK' s, analog clock drawing, reading code, and found such a function, it is based on the input day, month, can automatically calculate the day of the week

改变界面时钟位置以及布局，通过逆向System文件来获取系统显示时钟的函数并进行hook修改(Change the location and layout of the interface clock, get the function of the system display clock by reverse System file and modify the hook)